Fort Worth daily gazette. (Fort Worth, Tex.) 1882-1891, 1887-03-19
BITS OF IMPORTATION.
The Action of OF in MetaIs-Evaporation
of Water
Popular Science News.


Popular Science News.
J. J. Redwood Of London having made
a numOer Of heightened experiments,
principally With a view to determine the
oils best adapted for mixing with miner
al oils for luSricating purposes, has pub
lished the results obtained, resume of
which will be useful to hOrOIOgists, with
whom the action of different oils on met
ais is a subject of paramount Importance.
The metals were first thoroughly cleaned,
washed with ether and dried, and, after
being weighed, placed in cork tubes to-
gether with Is c. C. of the oil, the tubes
being kept for twelve months at an aver
age temperature Of about so F. in the
summer and at so to 80 f. in the win
ter. The results show that:
Iron is least affected by seal oil and
most by talIOw oil.
Brass is not affected by rape oil, least
by seal oil and most by olive oil.
Tin is not affected by rape oil, least
by olive oil and most by cotton seed Oil.
Lead is least affected by olive OIL and
most by whale oil; but whale lard and
sperm oils all act to very nearly the same
extent on lead.
ZINC seems, by the four actual weigh
ings that were of any value, 10 be not
acted on by mineral Iubrica Ting oils,
least by lard oil and most by sperm oil.
Copper is not affected by mineral lubri-
eating OIL, least by sperm Oil and most
by tallOW oil.
Mineral lu0ricating oil has no Gction
on zinc and copper, acts least on brass
and most on lead.
Olive oil acts least on tin and most On
copper.
Rape oil hiss nc action on brass and
tin, acts least On iron and most on cop
per.
TaIlow oil acts least on tin and most
on copper.
Lard oil acts least on zinc and most on
copper.
Cotton seed oil acts least on lead and
most on tin.
Sperm oil acts least Ga brass and most
on zinc.
Whale oil has no action on tin. acts
least on brass and most on lead.
Seal Oil acts least on brass and most
on copper.
Mineral iubTiCating OH has, therefore,
on the whole, the least ectiOn OR the met
ais experimental With, and sperm oil the
most. For lubricating the journals of
hesvy machinery, such as turret clocks,
either rape or sperm oil is the best OIL to
use III admiXture with mineral oil, as they
have the least effect on brass and iron,
which two metals generally constitute the
bearing surfaces Progressive Age.
1t is an almost universal practice to
have vessel of water attached to the
furnaces and stoves for the purpose of
mOlstening the air of the rooms heated by
them. The common notion that the
aqueous yapOr purifeS the air in any way
is, of course, absurd; but the possibility
that II may render the air heated by the
furnace more healthfUl and easier to
breathe may be worthy of consideration.
The following Calculation, based upon
conditions actually existing in resi-
dence, m4y serve to show the fallaCy of
of this belief: In the house referred to,
eight rooms, with an aggregate capacity
of l6, 500 cubic feet, are heated by 8 hot
air furnanCe, which evapOrateS one pail
full Of water, weighing eighteen pounds
daily. At a temperature of 10, assuming
the air in tAe house 10 be only half satu-
rated with moisture, the total amount
of water contained IN it will be about
twelve pounds. This would apparently
show that the eighteen pounds OF water
eYapOrated would have marked effect
upon the hygrometria state of the air,
but 1t must be remembered that a con-
slant current of fresh air is passing
through the furnace and into the house.
II would be low estimate to assume